There are two recurring themes throughout the playoffs: great defense and bad outside shooting.
For the Suns to even think about getting to the NBA final four, they need to become a great defensive team. This means EVERYONE on the team has to be strong on defense and plays hard all the time. They can't use gimmicks to cover weak defenders and cannot hope to play the better teams if forced to double team opponents on every play.
At the same time, the Suns needs to have five guys on the floor who can score. They can't afford a good passing/bad shooting point guard any more than they can afford a PG who can't defend. Nor can they afford an all defense no offense center any more than a center who can't defend.
Players need to be evaluated on how they fit into a potential championship team.